Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 827-162-2 | CAS number: 2218502-12-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- See the report for the analogue approach in section 13 "Other reports"
- Reason / purpose for cross-reference:
- read-across source
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 28 d
- Interpretation of results:
- not readily biodegradable
Reference
Description of key information
Not readily biodegradable
Key value for chemical safety assessment
Additional information
The assessment of the biodegradability of the substance CAS 218502-12-4 (Direct Black 168 Na Li salts) has been done by read-across from an structural analogue, CAS 93281-13-1 (Direct Black 168 Na salt). There is one study available for the substance with CAS 93281-13-1 (Direct Black 168 Na salt) done according to the OECD 301A (readily biodegradability). The results of the test gaves as result a degradation of the substance after 28 days of 0% . In view of the results, it was concluded that the colorant Direct Black 168 Na does not have a rapid biodegradation in the specific conditions of the 301A guideline.
Both substances CAS 218502-12-4 (Direct Black 168 NaLi salt) and CAS 93281-13-1 (Direct Black 168 Na salt) have the same organic anionic structure, therefore it is expected the same biodegradability concerning this organic part. Whereas the counterion of the substance CAS 93281-13-1 (Direct Black 168 Na salt) is the sodium, the ones of the substance with CAS218502-12-4(Direct Black 168 NaLi salt) are sodium and lithium. The inorganic cations do not contribute to the biodegradation of the substance and therefore, it is justified to consider that the substance with CAS 218502-12-4 (Direct Black 168 NaLi salt) will have at most the same degree of degradation of the substance with CAS 93281-13-1 (Direct Black 168 Na salt), which is "not readily biodegradable".
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
